Coupling for brush backs



G. w. BREUER ETAL COPLING FOR BRUSH BAcKs Filed April 22, 1949 Aug. 19, 1952 Man@ /rewes Jr,"-

zngefze Zambeau zvmey Thi-,sinvention'relates particularly concerned with the provision of a *coupling adapted, for use inl detachably connectsocket member mounted in upon the'plu'g'member'. v.

Patented Aug. 19.1952 ff" f 1;- UNITED STATES 1PMENTI 1=FICEY w "722,607,603v4 w l comme.' son. BRUSH BAcKs Y Grant W. Breuer, vWilmette, andMenke Dr'ewe's.k Jr., and Eugene Lambeau, Chicago, Ill., assignn i V'ors to Breuer Electric Manufacturing Company,

Chicago, Ill., a corporation of Illinois to couplingszand is more `ing brushnbacks to the operating shaft of a disctype ilocr treating machine. i

`vIn `the operation of this typel of floor treating machine, it is desirable to provide coupling means adapted-to facilitate the removal or replacement of brush backs. -The --present invention contemplates the Vprovision of a coupling comprising 'a plungersmounted upon the socket member. Y

'This invention further contemplates the pro-4 vision of a coupling comprising a plug! and socket member in'which the socket member is disengaged fromv theplug member by merely rotating same :in a reverse direction tothe normal direction of rotation of the operating shaft,

' This invention further contemplates rthe provision of a coupling in Whichthe socket member is automatically'locked onto'theplug member by merelyv inserting thevplug Vmember in the socket .f and thenstarting the motor employed to rotate the operating shaft. v 'Y This invention further contemplates theprovi- ,sion of a coupling for brush backs whichwisfrelativelysimple and inexpensive to manufacture which .will not readily get out of order.Y

Thisinvention embodies other V'novel features,

and

vdetails of constructionand -arrangement of parts which arehereinafter set forth in thef'specication andv claims, and yillustratedin the vaccom panying drawing,wherein.: f

f Fig. 1. is a side elevational view Yillustrating a coupling embodying features ofthe present invention, the socket member being disconnected from the plug member.

Fig. 2 is a bottom plan view showing the plug member. l

Fig. 3 is a top plan view Yshowing the socket member.- f

, Fig. iris a -transverse sectional View showing the operating position Referring now'to thdravving for a better unl derstanding of 'this invention,` the coupling is shown as comprising a plug member 6 formed with a iiange 'I adapted to be secure'dto the operating shaft 8 of ay floor treating machine by means of cap screws 9. The outer surface of the The socket member is preferably inthe formof a I.Application April 22, 1949, serial N."s9,113

schim-s. `(o1. 27e-L66) plug member e, is preferably yforriid with three equally spaced recesses I Leach of which terminates at an abutment shoulder I2.l Theplug member is also formed with a tapered outer end A socket member I4 is provided with a ange I5 adapted to be secured to a brush back 'IISv by means Vof bolts I1. The socket member I4 is in the form of a collar adapted to snugly receive-and engage the plug member 6, as illustrated in Fig. 4.

casting provided with three equally spacecLradially disposed bosses I8 which are bored'radially at I9 to receive plunger housings 2I. The outer surface of the plunger housings 2I areV preferably knurled and 'force fitted into their respective bores I9' provided in the bosses I8.

Each plunger housing 2I is bored at one end yat 22 to slid'ably receive a plunger 23, the other end of the housing being bored at 24to form an Y enlarged diameter chamber to receive a compression'spring 2t".l The inner end'of the bore 24 terminates at a shoulder 21 adapted to normally engage ahead portion 28 formed on the innerv endv Loi the plunger 23. A screw 29 is threaded into insure a satisfactory service life.A

In mounting the brush back I6 on the operating lshaft 8 of a floor treating machine bymeans of the coupling members heretofore described in connectionvvith the drawing,` the brush backis placed upon a oor with the socket member I4 ."5l

ber 6 to move into'the socket I4. By providing a tapered outer end I3 on the plug member IS rand by rounding the inner ends of the plungers 23,

` it will be noted that the plug-member 6 acts to move the lplungers 23 rearwardly against the action of their compression springs 26 until the plug member G is mounted within the socket mem- Yber I4. Byl causing rotational movement Eof vthe operating shaft 8 in the direction indicated-by @hef arrow innig. uit will benoied that the ends 'of the plungers 23 will become vautomatically seated in their respective' recesses 4I fand against their `respective abutment lshoulders 'y I2. "1' u In removing' the brush backv I Iirom thegoperating shaftS-'of the floor treating machinefthe brush end of the floor treating machine is tilted upwardly to raise the brush back from the fioor. The brush back I6 is then manually rotated in the direction of rotation of the operating shaft 8 to cause the plungers 23 to move out of their respective recesses l I. 'Ihe brush back I6 is then free to'rvfall'f'downwardly from its position on the plug member 6.

While this invention has been shown in but one form, it is obvious to those skilled in the art that; it is not so limited but is susceptible of various Ychanges and modifications without departing defini-ng walls ofieach of said recesses sloping in.-

wardly from the `outer surface of said plug niember and terminating at an abutment wall dis- -posed at substantially right angles to the recess walls, a tubular socket member formed to snugly receive said plug member, a plurality of radially 4disposed plungers mounted on said socket member Afor radial movement into and outof the recesses .formed in vsaid plug member, and resilientl means to yieldably resist radial movement of saidplungersfrom said recesses, the outer end of'said plug member having an outwardly converging frustro-coni-cal surface to engage .the

innerends of said plungers and .to-move the latter .radially outwardly during, insertion of the plug member into said socket member.

2. In a coupling for detachably connecting a brush back tothe operating shaft of a floor treating machine, a cylindrical plug member having its outer surface formed with a plurality of transversely disposed relatively 'elongated recesses,

the -dening wallsof each of said recesses sloping inwardly from the outer surface of said plug member and terminating at an abutment .wall disposed at substantially right angles to the recess Walls, a tubular socket member formed tosnugly receive said plug member, a .plurality of radially disposed plungers mounted on said socket member for radial movement into and vout of the recesses formed in saidplug member, and resilient means to yieldably resist radial movement of s aid plungers` from said recesses, Vthe outer'end of said plug member having an out- Wardly converging frustro-conical surface t-o engage the inner ends of said plungers and to move the latter radially outwardlyrduring insertion of theplug member into said socket member, each of said plungers being slidably mounted .Within a-radially disposed housing secured to said vsocket member.

3. In a coupling for detachably connecting` a l brush back to theoperating shaft of a oor treatling machine, a cylindrical plug member having its outer surface formed with a plurality of transverselydisposed relatively elongated recesses, the,

defining walls of each of saidrrecesses sloping .inwardly Vfrom the outer surface of4 said plug member and terminating at an abutment wall I disposed at n substantially right angles to the recess Walls, a tubular socket member formed to:

snugly receive said ,plug member, a plurality of radially disposed plungers mounted on said socket member for-radial movement into and out of the ,recesses-formed in said plug member, and `resil- ,nientmeans vte.yieldably resist radial movementv `outward" radial movement of 4 of said plungers from said recesses, the outer end of said plug member having an outwardly conf verging frustro-'conical surface to engage the inner ends of said plungers and to move the latter radially outwardly during insertion of the plug member into said socket member, each of said -.-plnngers lbeing s lidablygmounted within a housing Asecured to said socket member, theouter end of each housing being formed with a spring chamber, 'and a compression spring mounted Within each spring chamber to yeldably resist its respective plunger.. A A. i

4.1 I -nfa'pouplingffor detachably connecting a brush backzto the operating shaft of a :door treatmachine, Vac'ylindrical plug member having its, outer surface formed with a plurality of transversely disposed relatively elongated recesses, the d eiiningiwalls of each of said recesses sloping inwardly from the outer surface of said plug member andYterminating.y atl an abutmentfwall disposed'at lsubstantiallyright angles. to the. re,-

walls, a tubular socket` member formed to snugly receive said plug'member, a plurality of radially disposed plungers mountedv on said socket member for radial movement intoand out of thenrecesses formed in saidfplug member, and resilient means to, yieldably resist radial Vmovement of said plungersv fromy said; recessesi` the outer end of said plug member having an Veutwardly converging frustro-conical surface toen-- gage the inner ends of said plungersandto move the latter radially outwardly during ir-isertirm of the plus member into said socket member. said socket member being for-med with a flange adapted to be connected to a brush back. 5- In; a coupling: for detaehablv connecting. a

. brush back;l .to the operating shaft; of a iioorf treatrecessrwalls, a tubular socket memberv formed `to snugly-'- receive said plugA member, a plurality of radially disposed plungersl mounted on said socket member for radial movement 4into and out ofzthe. recesses formed in said plug member, Aand `resilient means to yieldably resist radial movement of said-plungers from said recesses, theouter end of said plug-jmemberhaving an out- Wardly converging -frus't-ro-conical surface to engage 'theinnerends of said'plungers and to move' the latter radially outwardly during insertion-of the vplug member into said socket member, said socket member being formed with a flange adapted to be connected to a brush back, saidv plug member being formed with a @ange adapted to be connected to the operating shaft of a floor treating machine.

6. ln a coupling for detachably connecting a brush back tothe operating shaft of a floor treating machine, a cylindrical plug member having its outer surface formed with a plurality of Atransversely disposed relatively elongated recesseathe dening walls of each of vsaid.'rece.Sses,,empirer inwardly. from the Aoui-,eri s ,Qfgaiq plug member anc terminating-agianbenehmen ldlsposed at' substantially rightang'les to 'the recess walls. a Y tubilar socket Ai11exi'1-bc r formed 5- f 6 socket member for radial movement into and out REFERENCES CITED 0f @11e recesses formedm Seldplug member and The following references are of record in the resilient; means to yleldably reslst radial moveme of this patent: ment of said plungers from said recesses, the outer end of said plug member having an out- 5 UNITED STATES PATENTS Wardly converging frustro-conical surface to Number Name Date engage the inner ends of said plungers and to 661,558 Shuff Nov, 13, 1900 move the latter radially `outwardly during nser- 789,222 Lovekn May 9, 1905 tion of the plug member into said socket mem- 1,119,392 Bernett Dec. 1, 1914 ber, said socket member being formed with a l0 1,814,655 Andreasson July 14, 1931 ange adapted tobe connected to a brush back, 1,844,446 spgm et al. Feb, 9, 1932 said plug member being formed with a iiange `adapted to be connected to the operating shaft FOREIGN PATENTS of a iioor treating machine, said socket member Number Country Date being disposed in abutting engagement against 15 19,503 Great Britain Sept. 1, 191l said plug member flange.

GRANT W. BREUER. MENKE DREWES, JR. EUGENE LAMBEAU. 

